Assembled by hand in Sturgis USA. Lifetime Warranty. Touring specific coil spring rates provide superior ride comfort, improved performance, and increase resistance to bottoming out for all day comfort. Preload adjusted by hand, no tools needed. Provided by spherical bearing on top and bottom mounting points for easy installation. High-flow piston reacts quickly for improved fluid flow. Deflective disc self-adjusts to frequency and endures controlled performance. Heavy Duty available for most models, see notes.